Click Green Flag. Adjust the 4 variable sliders, then when you are pleased with the design created, Press Space. Press S key (show) to show 4 sliders. Press H (Hide) to hide 4 sliders. Lines are drawn between two sprites. Those two sprites move to random positions on the Stage.
As a coder you need to consider the amount of interaction your User has with the elements of the coding. This version of the project gives the User multiple choices. For a project that involves the automatic running of the program see: https://scratch.mit.edu/projects/779752992/